his own plan to avoid the fiscal cliff today. does it add up? and the u.s. ambassador to the united nations comes under fire again. this time, it's over ra wwanda. let's go "outfront." evening, welcome, everybody. i'm soledad o'brien. breaking news. president obama puts the syrian president bashar al assad on notice. the president is reacting to new notice that the regime is mixing with chemicals to make deadly gas. and today, i want to make it absolutely clear to assad and those under his command, the world is watching. the use of chemical weapons is an would be totally unacceptable. and if you make the tragic mistake of using these weapons, there will be consequences and you will be held accountable. >> assad is on the edge of president obama's so-called red line against syria. the president said the summer that syria's use or movement of chemical weapons could mean u.s. intervention, so "outfront" tonight, barbara starr. how exactly clear is the evidence in fact they are now moving in a new step in the direction with chemical weapons? >> it was just over the weekend that the inte